The Glycidyl Methacrylate(GMA)／Styrene(St) multi-monomer melt-grafted polypropylene

PP-g-(GMA-co-St)

which has a high grafting degree of GMA

was blended with Polyamide 6 (PA6)．The morphologies and crystallization of the blends were investigated by means of SEM

DSC and WAXD．PP-g-PA6

which formed during the reactive blending process

improved greatly the compatibility of the blends and reduced the size of the dispersed phase dramatically．In the PP-g-(GMA-co-St)／PA6=3／7 blend

the fractionated crystallization of PP-g-(GMA-co-St) was observed．The crystallization of PP-g-(GMA-co-St) at the lower temperature should be assigned to homogeneous nucleation. In the 7／3 blend

due to the fine dispersion of PA6 phase

PA6 did not crystallize at its normal crystallization temperature (Tc)

but crystallized in the mode of homogeneous nucleation at a lower Tc simultaneously with the crystallization of PP-g-(GMA-co-St)．The WAXD showed PP-g-(GMA-co-St) and PA6 crystallized separately and no new crystalline forms formed in the blends．